Floating breakwater self-power-generation device based on flow-induced vibration

Abstract

A floating breakwater self-power-generation device based on flow-induced vibration comprises a first power generation mechanism and a second power generation mechanism. The first power generation mechanism comprises a mounting frame fixedly connected with a wave prevention unit of the floating breakwater, at least one linear generator is fixedly arranged on the mounting frame, the input end of the linear generator is connected with at least one vibrator through a transmission mechanism, the vibrator is horizontally arranged below the water surface, and the length direction of the vibrator is perpendicular to the water flow direction; the second power generation mechanism comprises a mounting rod and a connecting rod which are parallel to each other, the mounting rod is fixedly connected with the wave prevention unit, two swing power generation assemblies are connected between the mounting rod and the connecting rod, each swing power generation assembly comprises a deflection part and two magnetic generators, the lower portion of each deflection part is located below the water surface, and the upper portion of each deflection part extends out of the water surface; and the deflection is correspondingly connected with the two magnetic generators through the two mechanical motion rectifiers. The sea wave power generation device can fully absorb energy of sea waves for power generation and is high in power generation efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of wave energy power generation, in particular to a floating breakwater self-generating device based on flow-induced vibration. Background Art

[0002] Wave energy is one of the most important energy sources in ocean energy. It is a renewable clean energy that is easy to use directly and inexhaustible.

[0003] Flow-induced vibration (FIM) occurs when a fluid flows over the surface of a nonlinear object, generating alternating vortex discharges and periodic pulsating lift. If the nonlinear object is elastically supported, this produces periodic vibrations perpendicular to the direction of the flow, a phenomenon known as flow-induced motion (FIM). In engineering, FIM can exert alternating loads on structures, damaging their strength and shortening their service life. However, this vibration can also be harnessed to convert the mechanical energy generated by the vibration into electrical energy, thereby generating continuous power generation.

[0004] Existing offshore photovoltaic projects typically install generators near breakwaters, using ocean currents to drive impellers to generate electricity. The generated energy is then used to control the daily operation of the equipment. However, these generators prioritize the use of wave energy, resulting in low power generation efficiency. Utility Model Content

[0005] In order to solve the deficiencies in the prior art, the utility model provides a floating breakwater self-generating device based on flow-induced vibration, which can fully absorb the energy of waves for power generation and has high power generation efficiency.

[0006] In order to achieve the above purpose, the specific solution adopted by the utility model is:

[0007] A floating breakwater self-generating device based on flow-induced vibration comprises a first power generation mechanism and a second power generation mechanism;

[0008] The first power generation mechanism includes a mounting frame fixedly connected to the wave-breaking unit of the floating breakwater, at least one linear generator fixedly mounted on the mounting frame, an input end of the linear generator being connected to at least one vibrator via a transmission mechanism, the vibrator being horizontally disposed below the water surface, and a length direction of the vibrator being perpendicular to the direction of the water flow;

[0009] The second power generation mechanism includes a mounting rod and a connecting rod parallel to each other, and the mounting rod is fixedly connected to the wave-breaking unit. Two swing power generation components are connected between the mounting rod and the connecting rod. The swing power generation components include a pendulum and two magnetic generators. The lower part of the pendulum is located below the water surface, and the upper part of the pendulum extends out of the water surface. The pendulum is correspondingly connected to the two magnetic generators through two mechanical motion rectifiers.

[0010] Preferably, two of the linear generators are fixedly mounted on the mounting frame, the transmission mechanism includes a linear guide rail fixedly mounted on the mounting frame, a sliding body is slidably mounted on the linear guide rail, the sliding body is fixedly connected to all the vibrators, the two sliding bodies are fixedly connected via a linkage plate, and the linkage plate is fixedly connected to the input ends of the two linear generators.

[0011] Preferably, the linkage plate is fixedly connected to two movable plates, the movable plates are fixedly connected to the input ends of the linear generator, the movable plates are fixedly connected to a connecting plate extending below the water surface, the lower end of the connecting plate is fixedly connected to a force transmission plate, and the vibrator is fixedly connected between the two force transmission plates.

[0012] Preferably, in the swing power generation assembly, the yaw is located between the two mechanical motion rectifiers, and the yaw is connected to the input shafts of the two mechanical motion rectifiers through a hinge assembly.

[0013] Preferably, the housing of the mechanical motion rectifier is connected to the mounting rod or the connecting rod through a connecting unit.

[0014] Preferably, the vibrator is in the shape of a triangular prism, and one of the edges of the vibrator is arranged upward.

[0015] Preferably, the wave-breaking unit includes a main body, and the top of the wave-facing surface of the main body is integrally connected with an extension portion.

[0016] Preferably, a recessed portion is provided in the middle of the wave-facing surface of the wave-breaking unit, and a smooth transition is formed between the upper edge of the recessed portion and the extending portion.

[0017] Preferably, a cylindrical expansion portion is integrally connected to the bottom of the wave-breaking unit, and the axis of the expansion portion is parallel to the distribution direction of all the wave-breaking units, and there is a smooth transition between the expansion portion and the recessed portion.

[0018] The utility model can utilize the first power generation mechanism to absorb the energy of waves below the water surface to generate the first electric energy, and can utilize the second power generation mechanism to absorb the energy of waves near the water surface to generate the second electric energy. The first power generation mechanism and the second power generation mechanism cooperate to fully absorb the energy of waves, and the power generation efficiency is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 It is a three-dimensional diagram of the overall structure of the utility model;

[0021] Figure 2 It is a side view of the overall structure of the utility model;

[0022] Figure 3 It is a structural diagram of the hinge assembly.

[0023] Figure markings: 1-mounting frame, 2-linear generator, 3-linear guide rail, 4-linkage plate, 5-sliding body, 6-movable plate, 7-connecting plate, 8-force transmission plate, 9-oscillator, 10-wave-proof unit, 11-extension part, 12-recessed part, 13-expansion part, 14-mounting rod, 15-connecting rod, 16-connecting unit, 17-mechanical motion rectifier, 18-input shaft, 19-deflection, 20-notch, 21-transmission rod, 22-ear plate, 23-magnetic generator. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] like Figure 1 and 2 As shown, a floating breakwater self-generating device based on flow-induced vibration includes a first power generation mechanism and a second power generation mechanism.

[0026] The first power generation mechanism includes a mounting frame 1 fixedly connected to the wave-breaking unit 10 of the floating breakwater. At least one linear generator 2 is fixedly arranged on the mounting frame 1. The input end of the linear generator 2 is connected to at least one vibrator 9 through a transmission mechanism. The vibrator 9 is horizontally arranged below the water surface, and the length direction of the vibrator 9 is perpendicular to the direction of the water flow.

[0027] The second power generation mechanism includes a mounting rod 14 and a connecting rod 15 that are parallel to each other, and the mounting rod 14 is fixedly connected to the wave-breaking unit 10. Two swinging power generation components are connected between the mounting rod 14 and the connecting rod 15. The swinging power generation components include a pendulum 19 and two magnetic generators 23. The lower part of the pendulum 19 is located below the water surface, and the upper part of the pendulum 19 extends out of the water surface. The pendulum 19 is correspondingly connected to the two magnetic generators 23 through two mechanical motion rectifiers 17.

[0028] The present invention is applied to floating breakwaters used in offshore photovoltaic projects. When in use, the first power generation mechanism and the second power generation mechanism are both installed on the breakwater unit 10 of the floating breakwater, and it is ensured that the vibrator 9 is located below the water surface, the lower part of the pendulum 19 is located below the water surface and the upper part can extend out of the water surface. In the process of waves impacting the breakwater unit 10, the first power generation mechanism and the second power generation mechanism both generate electrical energy. Specifically, in the process of waves moving toward the breakwater unit 10, the vibrator 9 and the pendulum 19 will be impacted. After being impacted, the vibrator 9 will vibrate up and down, and drive the input end of the linear generator 2 to move, thereby driving the linear generator 2 to generate electricity and generate the first electrical energy; the pendulum 19 will swing and move after being impacted by the waves, and then drive the magnetic generator 23 to move and generate electricity through the mechanical motion rectifier 17, generating the second electrical energy. Furthermore, the first electrical energy and the second electrical energy can be stored or connected to the grid separately.

[0029] The utility model can utilize the first power generation mechanism to absorb the energy of waves below the water surface to generate the first electric energy, and can utilize the second power generation mechanism to absorb the energy of waves near the water surface to generate the second electric energy. The first power generation mechanism and the second power generation mechanism cooperate to fully absorb the energy of waves, and the power generation efficiency is higher.

[0030] It should also be noted that the vibrator 9 is arranged below the wave-breaking unit 10. After the waves hit the wave-breaking unit 10, they will generate backflow and turbulence near the wave-breaking unit 10, which will in turn affect the subsequent waves and offset part of the energy of the subsequent waves, thereby avoiding the high-intensity vibration of the vibrator 9 caused by the wave flow being too fast, and then causing damage to the vibrator 9, thereby protecting the vibrator 9.

[0031] It should be noted that the mechanical motion rectifier 17 in the present invention can be based on existing technology, such as the mechanical motion rectifier based on a planetary gear train disclosed in Chinese patent document CN114233816A. The magnetic generator 23 is a mature existing technology that converts mechanical energy into electrical energy through the principle of electromagnetic induction and will not be described in detail here.

[0032] The specific configuration of the first power generation mechanism is as follows: two linear generators 2 are fixedly mounted on a mounting frame 1; a transmission mechanism includes a linear guide 3 fixedly mounted on the mounting frame 1; a sliding body 5 is slidably mounted on the linear guide 3; the sliding body 5 is fixedly connected to all vibrators 9; the two sliding bodies 5 are fixedly connected via a linkage plate 4; and the linkage plate 4 is fixedly connected to the input ends of both linear generators 2. By providing the linear guide 3 and the sliding body 5, the cooperation between the sliding body 5 and the linkage plate 4 can ensure that the vibration amplitudes of various parts of the vibrator 9 remain consistent, thereby avoiding damage to the vibrator 9 or the linear generator 2 due to uneven vibration. Furthermore, the two linear generators 2 can operate synchronously, thereby ensuring good consistency in the first electrical energy generated by the two linear generators 2, facilitating subsequent storage or grid connection.

[0033] The specific connection method between the linkage plate 4 and the vibrator 9 is as follows: the linkage plate 4 is fixedly connected to two movable plates 6, which are fixedly connected to the input ends of the linear generator 2. The movable plates 6 are fixedly connected to a connecting plate 7 extending below the water surface. The lower end of the connecting plate 7 is fixedly connected to a force transmission plate 8. The vibrator 9 is fixedly connected between the two force transmission plates 8. Through this structure, multiple vibrators 9 can be installed between the two force transmission plates 8 to fully absorb wave energy, thereby improving the power generation efficiency of the first power generation mechanism. Furthermore, the vibrator 9 is in the shape of a triangular prism, with one of the edges of the vibrator 9 facing upward.

[0034] In order to improve the power generation efficiency of the swing power generation assembly, in the swing power generation assembly, the yaw 19 is plate-shaped, and the yaw 19 is located between the two mechanical motion rectifiers 17, and the yaw 19 is connected to the input shafts 18 of the two mechanical motion rectifiers 17 through a hinge assembly. More specifically, Figure 3 As shown, a notch 20 is provided at one side edge of the yaw 19. The hinge assembly includes two lugs 22 and a transmission rod 21 fixedly disposed in the notch 20. The two lugs 22 are respectively fixedly disposed on the input ends of the two mechanical motion rectifiers 17. The lugs 22 are provided with through holes, through which the transmission rod 21 passes. Placing the yaw 19 between the two mechanical motion rectifiers 17 allows the yaw 19 to drive a mechanical motion rectifier 17 during its swinging and moving to either side, thereby driving the magnetic generator 23 to generate electricity. The mechanical motion rectifier 17 is installed as follows: the housing of the mechanical motion rectifier 17 is connected to the mounting rod 14 or the connecting rod 15 via the connecting unit 16.

[0035] Furthermore, a recessed portion may be provided on each side of the pendulum 19, with the depth of the recessed portion gradually increasing from the edge toward the center of the pendulum 19. With this structure, when waves impact the inner wall of the recessed portion, they are guided by the inner wall toward the center of the recessed portion, thereby better promoting the swing and movement of the pendulum 19.

[0036] The specific structure of the wave-breaking unit 10 is as follows: the wave-breaking unit 10 includes a main body, the top of the wave-facing surface of the main body is integrally connected with an extension part 11, the middle part of the wave-facing surface of the wave-breaking unit 10 is provided with a recessed part 12, and the upper edge of the recessed part 12 and the extension part 11 have a smooth transition, the bottom of the wave-breaking unit 10 is integrally connected with a cylindrical expansion part 13, and the axis of the expansion part 13 is parallel to the distribution direction of all the wave-breaking units 10, and there is a smooth transition between the expansion part 13 and the recessed part 12. The lower part of the wave-breaking unit 10 is set as a cylindrical expansion part 13, which has better force-bearing performance and can prevent the waves from generating an overturning moment on the entire breakwater when hitting the lower part of the wave-breaking unit 10, thereby fully ensuring the safety of the breakwater and further ensuring the overall safety of the self-generating device; the middle and upper parts of the wave-breaking unit 10 can guide part of the water flow along the depression 12 and the extension part 11 when the waves hit the wave-breaking unit 10, so as to prevent the waves from crossing the wave-breaking unit 10, and can reversely impact the pendulum 19, so that the pendulum 19 can continue to swing repeatedly, thereby improving the power generation efficiency of the second power generation mechanism.

[0037] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0038] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A floating breakwater self-generating device based on flow-induced vibration, characterized in that: comprising a first power generation mechanism and a second power generation mechanism; The first power generation mechanism comprises a mounting frame (1) fixedly connected to a wave-breaking unit (10) of a floating breakwater, at least one linear generator (2) being fixedly arranged on the mounting frame (1), an input end of the linear generator (2) being connected to at least one vibrator (9) via a transmission mechanism, the vibrator (9) being horizontally arranged below the water surface, and a length direction of the vibrator (9) being perpendicular to a water flow direction; The second power generation mechanism includes a mounting rod (14) and a connecting rod (15) that are parallel to each other, and the mounting rod (14) is fixedly connected to the wave-proof unit (10). Two swing power generation assemblies are connected between the mounting rod (14) and the connecting rod (15). The swing power generation assembly includes a yaw (19) and two magnetic generators (23). The lower part of the yaw (19) is located below the water surface, and the upper part of the yaw (19) extends out of the water surface. The yaw (19) is correspondingly connected to the two magnetic generators (23) through two mechanical motion rectifiers (17).

2. The floating breakwater self-generating device based on flow-induced vibration according to claim 1, characterized in that: Two linear generators (2) are fixedly mounted on the mounting frame (1), and the transmission mechanism comprises a linear guide rail (3) fixedly mounted on the mounting frame (1). A sliding body (5) is slidably mounted on the linear guide rail (3), and the sliding body (5) is fixedly connected to all the vibrators (9). The two sliding bodies (5) are fixedly connected via a linkage plate (4), and the linkage plate (4) is fixedly connected to the input ends of the two linear generators (2).

3. The floating breakwater self-generating device based on flow-induced vibration according to claim 2, characterized in that: The linkage plate (4) is fixedly connected to two movable plates (6), the movable plates (6) are fixedly connected to the input ends of the linear generator (2), the movable plates (6) are fixedly connected to a connecting plate (7) extending below the water surface, the lower end of the connecting plate (7) is fixedly connected to a force transmission plate (8), and the vibrator (9) is fixedly connected between the two force transmission plates (8).

4. The floating breakwater self-generating device based on flow-induced vibration according to claim 1, characterized in that: In the swing power generation assembly, the yaw (19) is located between the two mechanical motion rectifiers (17), and the yaw (19) is connected to the input shafts (18) of the two mechanical motion rectifiers (17) through a hinge assembly.

5. The floating breakwater self-generating device based on flow-induced vibration according to claim 4, characterized in that: The housing of the mechanical motion rectifier (17) is connected to the mounting rod (14) or the connecting rod (15) via a connecting unit (16).

6. The floating breakwater self-generating device based on flow-induced vibration according to claim 1, characterized in that: The vibrator (9) is in the shape of a triangular prism, and one of the edges of the vibrator (9) is arranged upward.

7. The floating breakwater self-generating device based on flow-induced vibration according to claim 1, characterized in that: The wave-breaking unit (10) comprises a main body, and the top of the wave-facing surface of the main body is integrally connected with an extension portion (11).

8. The floating breakwater self-generating device based on flow-induced vibration according to claim 7, characterized in that: A recessed portion (12) is provided in the middle of the wave-facing surface of the wave-breaking unit (10), and a smooth transition is formed between the upper edge of the recessed portion (12) and the extending portion (11).

9. The floating breakwater self-generating device based on flow-induced vibration according to claim 8, characterized in that: A cylindrical expansion portion (13) is integrally connected to the bottom of the wave-breaking unit (10), and the axis of the expansion portion (13) is parallel to the distribution direction of all the wave-breaking units (10), and there is a smooth transition between the expansion portion (13) and the recessed portion (12).

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